The generator matrix

 1  0  1  1  1 14  1  1  8  1  6  1  1  8  1  1  1  1 12  1  1
 0  1 11  6  5  1 13  0  1 14  1  3  8  1  6  4 10  3  1  7  8
 0  0 12  0  0  8  0 12 12  4  4  4  0  8 12 12  8  0 12  8  0
 0  0  0 12  8 12  4 12  8  8 12 12 12  4  4  8  8  8 12  4  4

generates a code of length 21 over Z16 who´s minimum homogenous weight is 17.

Homogenous weight enumerator: w(x)=1x^0+30x^17+202x^18+314x^19+1218x^20+614x^21+1198x^22+284x^23+177x^24+26x^25+14x^26+10x^27+4x^28+2x^29+2x^30

The gray image is a code over GF(2) with n=168, k=12 and d=68.
This code was found by Heurico 1.16 in 0.0546 seconds.